davis



R. W. DAVIS. WRBNGH. No. 286,913. Patented'Oot. 16, 1883.

jaw, and on the sides of the shank B sliding i UNITEDA STATES:

ROBERT YV. DAVIS, OF ELMIRA, NEVV YORK, SSIGNOR TO THE DAVIS wRENcHCOMPANY, or SAME rLAcn.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 286,913, dated October16, 1883.

Application filed March 24, 1883.

To all whom it may concern:

Be it known that I, ROBERT VV. DAvIs, of Elmira, in the county ofChemung, in the State of New York, have invented new and usefulVImprovements in Wrenches, of which the following, taken in connnectionwith the accompanying drawings, is a full, clear, and exact description.

This invention relates to that class of wrenches which are designatedmonkeywrenches,77 my invention consistingin anovel construction andcombination of the constituent parts of said wrench, wherebycompactness, stability, and durability, combined with lightness ofstructure, are imparted thereto, and greater range of work and increasedfacility of its adjustment to the work are obtained.

The invention is fully illustratedl in the anneXed drawings, whereinFigure 1 is a side view of my improved wreneh. Fig. 2 is averticallongitudinal section of the same; and Fig. 3, a transverse section online w x, showing the under side of the movable jaw of the wrench.

Similar letters of reference indicate corresponding parts; I

A denotes the stationary jaw, fixed to the end of the shank B of thewrench in the usual manner. Said shank I provide with a serrated ortransversely creased face extended the length of one side thereof,preferably the side facing the gripping end of the j aws.

C represents the adjustable jaw, which I provide on the side adjacent tothe serrated face of the shank B with a serrated bearing, c, in the formof semicircular block fitted in a corresponding semicircular socket, r,in the under side of the jaw O, and secured therein by a screw, n,passing through the center of said block, and serving as a pivot uponwhich the block may turn to accommodate itself to any lateral motion ofthe jaw which may be produced by the wear on the mortise m of thethrough said mortise, thereby nvariably obtaining a secure hold for theserrated block on the serrated face of the shank B. The mortise m of thejaw Cis sufficiently elongated between the serrated side and oppositeside of (No model.)

the shank B to allow the jaw to play laterally and carry the serratedblock c out of engagement with the serrated side of the shank B. Theinterior of the jaw O is provided 'with a socket, a, extended at rightanglesfrom the side of the mortise m adj acent to the serrated face ofthe shank B. In said socket a slides a bolt or piston, (Z, which .isbacked by a spring, 8, by means of ``which the jaw O is crowdedlaterally to keep the serrated block c clear of the serrated side of theshank B. Through the back of the jawl O is extended a screw-threadedsocket, Z), which is in range with the socket a, so that it can bedrilled at the same time. In the socket b works a setscrew, e, by thetightening of which against the back of the shank B the jaw O is drawntoward the set-screw, and the serrated block c is thus caused to engagewith the serrated face of the shank, and thereby firmly retain the jaw Oin its position. It will be observed that by slackening the set-screwthe jaw O is released to allow it to freely slide on the shank B, andthus to be readily set up to its work, and then by simply turning thesetscrew e, which can be manipulated by the same hand which holds thewrench, the jaw C is qnickly and securely retained in its aforesaidposition.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-- 1. In combination with the serrated shank B,provided with the fixed jaw A, Jthe jaw O, adapted to slide on saidshank, and provided with the sockcts a and b, and with the serratedbearing c, the spring-bearing d in the socket a, and the set-screw einthe socket Z), substantially as shown and set forth.

2. In combination with the i serrated shank B, provided with the fixedjaw A, the jaw G, adapted to slide on said shank, andhaving the socketsa and Z) in range with each other, the bolt d and spring 8, seated inthe socket a, the set-screw e in the socket b, and the serrated block c,detachably connected to the jaw,substantially as described and shown.

3. In combination with the serrated shank B, provided with the fixed jawA, the jaw O, adapted to slide on said shank, and provided with thespring-bearing d, set-screw, e, and of two attesbng Wtnesse, at Ehnira,in the semieircular socket 1', and the serrated block county of Ohemung,in the State of New York7 c, pivoted in said socket by theattaehingthis17th day of March 1883.

screw n, all eonstructed and combined sub- ROBERT XV. DAVIS. [L SJ 5stzmtially as descrbed and shown. Vitnesses:

In' testimony whereoflhavehereunto signed A. W. DAVIS,

my name and affixed my Seal, in thepresence F. G. HALL.

